I have one of these , fab machines , I regularly get out to 3.5 km before RTH kicks in , have a 4000mA lipo which gets me 60 mins , just took delivery of a 7000mA Li Ion so hoping for 90+ mins . Havnt done the 4g mod yet . Good luck with sale , whoever buys will be very pleased .

Just to ad to this comment, this parrot disco is a mad thing you will not be disappointed I own one and I have done 4G mod its unreal on the distance they are selling quickly and very pricy because they are not in production lane anymore....
Just saying forgive me if intruding.